by Djamin, Zulkarnain $6.00
by Veithzal Rivai $48.00
by Richard G. Lipsey & Peter O. Steiner $18.00
by Sudarwan Danim $7.00
by Prof. Drs. S. Pamudji, M.P.A $9.00
by Drs. Zifirdaus Adnan & Dra. I. Zifirdaus $9.00